JP2006282364A - Public-address system for safety notice in crane work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a public-address system for safety notice in crane work, for thoroughly alarming all of workers to safety. <P>SOLUTION: The public-address system for safety notice in crane work comprises: a directivity control part 14 attached to a crane 30 and modulating a carrier wave belonging to an ultrasound band by audible sound signal; sound wave emission parts 16a to 16d emitting a modulated signal from the directivity control part 14 as a superdirective sound wave, and transmitting the audible through the superdirective sound wave; a voice signal source 13 holding a plurality of pieces of caution advice data for notifying danger in the crane work; an operator operation part 11 receiving input indicating that the worker has entered into the audible sound area wherein the audible sound from the sound wave emission parts 16a to 16d reach, and the input of a kind of the ongoing crane work; and a voice start control part 12 selecting the caution advice data corresponding to the type of the crane work from the voice signal source 13 to convert it into an audible sound signal, when the operator operation part 11 receives the input indicating that the worker enters into the audible sound area, and then the audible sound signal is supplied to the directivity control part 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a crane work danger notification loudspeaker which is incorporated in a crane used at a construction site, a civil engineering site, or the like and which notifies a worker near the crane of the danger.

  A crane used at a construction work site, a civil engineering work site, or the like is an indispensable facility for carrying in building materials, carrying in installation equipment, and the like. When carrying out slinging work using a crane, the operator attached a banner stating "No entry in swivel range" to the crane arm and called attention to the workers in the vicinity. The crane operator recognizes that “no entry within the swivel range” and engages in the work. However, workers who are not involved in the work are less aware of the danger and sometimes work near the crane. For example, since various construction workers are in and out of a large-scale site, there is a case where equipment is carried in the crane turning range inadvertently. Accidents caused by slinging work are highly likely to be damaged by falling objects due to cargo collapse. When the operator found an operator near the crane, he called for attention with his voice.

JP 2000-5454 A

  At the conventional construction site, attention was paid to the workers in the crane turning range as described above. However, because there is a lot of noise at the construction site, it is often impossible to reach the workers by caution only with the real voice. However, there was a problem that thorough safety was not performed.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a crane work danger notification loudspeaker for calling all workers thoroughly for safety.

  A crane work danger notification loudspeaker according to the present invention is attached to a crane, and modulates a carrier wave belonging to an ultrasonic band by an audible sound signal, and radiates a modulation signal from the modulation unit as a superdirective sound wave, An acoustic radiation unit that transmits audible sound via the super-directional sound wave, an audio signal source that holds a plurality of caution recommendation data for notifying danger due to crane work, and an audible sound from the acoustic radiation unit arrive An operator operation unit that accepts the input of the type of crane work that is currently being performed and the fact that the worker has entered the audible area, and the operator operation unit is in the audible area where the audible sound from the acoustic radiation unit reaches. When receiving the input indicating that the vehicle has entered, the caution recommendation data corresponding to the type of crane work that has been input is selected from the audio signal source and converted into an audible sound signal, and the modulation unit It is obtained by a voice control unit supplies.

  According to the present invention, a crane work danger notification loudspeaker is attached to a crane and modulates a carrier wave belonging to an ultrasonic band by an audible sound signal, and radiates a modulation signal from the modulation unit as a superdirective sound wave. An audible sound from the sound radiating unit, a sound radiating unit that transmits audible sound via the super-directional sound wave, a sound signal source that holds a plurality of caution recommendation data for notifying the danger of crane work, and An operator operation unit that accepts the input of the type of crane work that is currently being performed and the fact that the worker has entered the audible area to reach, and the operator operation unit works in the audible area where the audible sound from the acoustic radiation unit reaches When an input indicating that an operator has entered is received, the caution recommendation data corresponding to the type of crane operation that has been input is selected from the audio signal source, converted into an audible sound signal, Since it is configured to include a sound control section for supplying the parts, there is an effect that can call attention to notify by voice that the crane is operated to workers.

Embodiment 1 FIG.
FIG. 1 is a block diagram of a crane work danger notification loudspeaker according to Embodiment 1 of the present invention. As shown in the figure, the crane work danger notification loudspeaker includes an operator operation unit 11, a voice start control unit (voice control unit) 12, a voice signal source 13, a directivity control unit (modulation unit) 14, amplifiers 15a to 15d, The acoustic radiation units 16a to 16d are provided. FIG. 2 is a block diagram of a monitoring device used with the crane work danger notification loudspeaker of FIG. As shown in the figure, the monitoring device includes a crane hook monitoring camera 21a, crane upper monitoring cameras 21b to 21d, a monitor control device 22, and an operator monitor 23.

  FIGS. 3A and 3B are diagrams for explaining the installation positions of the crane work danger notification loudspeaker and the monitoring device shown in FIGS. 1 and 2, and FIG. 3A is a side view of the crane 30. ) Is a plan view of the crane 30. As shown in the figure, the crane hook monitoring camera 21 a and the acoustic radiation unit 16 a are attached to a hook 32 that is suspended from the arm 31 of the crane 30. Also, the crane upper monitoring camera 21b and the acoustic radiation unit 16b are in front of the upper part of the crane 30, the crane upper monitoring camera 21c and the acoustic radiation unit 16c are on the left side of the upper part of the crane 30, and It is attached to the right side of the upper part of the crane 30. The crane hook monitoring camera 21a can turn 360 degrees, and the angle may be adjusted by an operator.

  Components other than the crane hook monitoring camera 21a, the crane upper monitoring cameras 21b to 21c, and the acoustic radiation units 16a to 16d may be installed in an operation room of the crane.

  The monitoring device is attached to the crane 30 at the above-described position in order to eliminate blind spots from the operator during sling work by the operator or during movement within the construction site, and the surroundings of the crane 30 are photographed and presented to the operator. To do. Thereby, an operator's visual field can be expanded.

  The crane hook monitoring camera 21a and the crane upper monitoring cameras 21b to 21d are activated when the operator operates the crane, and start imaging of the crane hook downward direction, the crane forward direction, and the left and right directions, respectively, and monitor and control the imaging data. Supply to device 22. The monitor control device 22 receives the image data and displays it on the operator monitor 23 as a divided image, an enlarged image, or the like.

  When the operator observes the operator monitor 23 during work and finds that a worker has entered the danger area, the operator operates the operator operation unit 11 to activate the crane work danger notification loudspeaker. At this time, the operator inputs the current crane work type to the operator operation unit 11. In response to the operation, the operator operation unit 11 issues an instruction to radiate sound to the sound start control unit 12. When the voice start control unit 12 receives the instruction, the voice start control unit 12 selects and emits the one corresponding to the type of crane work from the voice guidance data (caution recommendation data) held by the voice signal source 13.

  The audio signal source 13 holds all data related to the crane work danger notice. For example, there are data such as prohibition of entry within the crane turning range, overhead warning during slinging, caution involving entrainment during crane movement, and prompt relocation advice. The voice signal source 13 electrically converts the caution recommendation data selected by the voice start control unit 12 and outputs it to the directivity control unit 14 as a voice guidance signal (audible sound signal).

  The directivity control unit 14 modulates the carrier wave belonging to the ultrasonic band with the voice guidance signal generated by the voice signal source 13 to control the directivity, and supplies it to the amplifiers 15a to 15d. The amplifiers 15d to 15d amplify the received modulation signals and supply them to the acoustic radiation units 16a to 16d. Each of the acoustic radiation units 16a to 16d is a super-directional speaker, and radiates the received modulation signal into the air as a directional sound wave.

  Since the sound waves radiated from the acoustic radiation units 16a to 16d have strong directivity, the modulation signal is demodulated in the air to form an audible range in each limited range. As shown in FIGS. 3A and 3B, the sound waves emitted from the acoustic radiation units 16a to 16d form audible ranges indicated by 16a 'to 16d', respectively.

  As described above, according to the first embodiment, the acoustic radiation units 16a to 16d are attached to the crane 30, and the caution recommendation is made to the workers around the crane 30 by superdirective sound waves. An effect is obtained in which the operator can be alerted by voice that the crane 30 is operating. In addition, since the periphery of the crane 30 is photographed using a plurality of surveillance cameras and the imaging data is presented to the operator, the operator can immediately find the worker who has entered the danger area by observing the surveillance camera. become. In addition, by using a plurality of acoustic radiation units, it is possible to obtain an effect that it is possible to simultaneously issue a caution recommendation to multiple points.

  In addition, since the sound radiation units 16a to 16d use superdirective speakers, the sound can be transmitted to workers who have entered the danger area without spreading in all directions, and occupational accidents can be prevented. The effect which can suppress the noise of neighborhood is acquired.

  In addition, you may use a drip-proof type | mold for the acoustic radiation | emission parts 16a-16d.

It is a block diagram of the crane work danger notification loudspeaker according to Embodiment 1 of the present invention. It is a block diagram of the monitoring apparatus used with the crane work danger notification loudspeaker of FIG. (A), (b) is a figure explaining the attachment position of a crane work danger notification loudspeaker and a monitoring apparatus, (a) is a side view of a crane, (b) is a top view of a crane.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Operator operation part, 12 Voice start control part (voice control part), 13 Voice signal source (voice control part), 14 Directivity control part (modulation part), 15a-15d Amplifier, 16a-16d Sound radiation | emission part, 16a ' -16d 'audible range, 21a crane hook monitoring camera, 21b-21d crane upper monitoring camera, 22 monitor control device, 23 operator monitor, 30 crane, 31 arm, 32 hook.

Claims (3)

Attached to the crane,
A modulation unit that modulates a carrier wave belonging to an ultrasonic band by an audible sound signal;
An acoustic radiation unit that emits a modulation signal from the modulation unit as a superdirective sound wave, and transmits an audible sound via the superdirective sound wave;
An audio signal source that holds multiple caution advisory data to alert you to danger from crane work;
An operator operation unit that receives an input of the type of crane work that is currently performed, and that the worker has entered the audible area where the audible sound from the acoustic radiation unit reaches,
When the operator operation unit receives an input indicating that a worker has entered the audible area where the audible sound from the acoustic radiation unit reaches, the caution recommendation data corresponding to the type of the crane operation that has been input is the audio signal. A crane work danger notification loudspeaker comprising: a sound control unit that is selected from a source, converts the signal into an audible sound signal, and supplies the signal to the modulation unit.   The crane work danger notification loudspeaker according to claim 1, further comprising a plurality of acoustic radiating portions that transmit audible sounds toward the front and side of the crane. The crane work danger notification loudspeaker according to claim 1 or 2, further comprising a monitoring device that images an audible area where an audible sound from an acoustic radiation unit reaches and presents the imaged data to an operator of the crane. .

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